MIAMI – Colts cornerback Nick Harper went through the entire week without practicing with the team because of his high ankle sprain, but he said he plans on playing in tomorrow’s Super Bowl. How much he’ll play is the real question.

“Nick has been rehabbing on a treadmill, that type of thing, and hasn’t done any practicing yet,” Colts coach Tony Dungy said yesterday. “Our doctors feel pretty confident that he’s going to be able to go. What they aren’t sure of is how long he’ll be able to go at top speed.

“That’s a decision we’re going to have to make (tomorrow) after Nick warms up. I think he’ll be very honest with me. He wants to play, but he knows we’ve got guys that will do the job if he’s not able to go. I think that will be a game-time decision.”

Should Harper not be able to start, Marlin Jackson would start and Kelvin Hayden would assume Jackson’s role as the nickel back.

“I’m in the game plan already. It just means I would be in it even more,” Jackson said. “I still think [Harper] is going to play. It’s the Super Bowl. But either way, I am preparing myself mentally to do whatever I need to do.”

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Dungy has invited Indy car racer Helio Castroneves to talk to the team.

“Helio and I have gotten to become good friends,” Dungy said. “He actually let me in his pit when they were getting ready for the Indianapolis 500. And it’s the same type of thing. I think it is a big stage and the Super Bowl of their sport and he’s won a couple of them.

“I want him to address the team a little bit about what it means to win the biggest game in your sport. And he’s also a big Colts fan, so it will be a win-win situation for us.”

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Colts wide receiver Marvin Harrison is an eight-time Pro Bowl selection who has two touchdown catches in 13 career postseason games. Defensive tackle Dan Klecko is a 275-pound reserve who has one postseason TD catch, which came in the AFC Championship game against New England, the team that waived him before the season.

“I’m catching up to him, I guess,” Klecko said.

Klecko will play in the third Super Bowl of his four-year career. He won rings with New England in 2003 and 2004.

“Not too shabby for a kid, huh?” said Dan’s father, Joe Klecko, the former Jets great.